CMPXCHG_LOCK (M64, R64) - Port Usage


With blocking instructions for port '0':


With blocking instructions for port '1':


With blocking instructions for port '4':

⇨ One μop that can only use port '4'

With blocking instructions for port '5':


With blocking instructions for ports {'0', '1'}:


With blocking instructions for ports {'0', '6'}:

⇨ 4 μops that can only use ports {'0', '6'}

With blocking instructions for ports {'1', '5'}:


With blocking instructions for ports {'2', '3'}:

⇨ 2 μops that can only use ports {'2', '3'}

With blocking instructions for ports {'0', '1', '5'}:


With blocking instructions for ports {'0', '1', '5', '6'}:

⇨ 5 μops that can only use ports {'0', '1', '5', '6'}

With an indexed addressing mode


With blocking instructions for port '0':


With blocking instructions for port '1':


With blocking instructions for port '4':

⇨ One μop that can only use port '4'

With blocking instructions for port '5':


With blocking instructions for ports {'0', '1'}:


With blocking instructions for ports {'0', '6'}:

⇨ 4 μops that can only use ports {'0', '6'}

With blocking instructions for ports {'1', '5'}:


With blocking instructions for ports {'2', '3'}:

⇨ 2 μops that can only use ports {'2', '3'}

With blocking instructions for ports {'0', '1', '5'}:


With blocking instructions for ports {'0', '1', '5', '6'}:

⇨ 5 μops that can only use ports {'0', '1', '5', '6'}